Ventilator.



\ PATENTED FEB. 11, 1908. A. B. REDELL & J. A. PANTER.

VENTILATOR. APPLICATION TILED APR.11 .1907.

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No. 879,120. PATENTED FEB. 11, 1908. A. B. REDELL & J. A. PANTER.

VBNTILATOR. APPLIOATION FILED APE.11,1907.

2 SHEETS-SHEET Z,

, UNITED STATES PATENT OFFICE.

ALVIN B. REDELL AND JOHN A. PANTER, OF CHICAGO, ILLINOIS, ASSIGNORS TO NATIONAL VENTILATOR AND MFG. 00., OF CHICAGO, ILLINOIS, ACORPORATION OF ILLINOIS.

VENTILATOR.

Specification of Letters Patent.

Patented Feb. 11, 1908.

To all whom it may concern:

Be it known that we, ALVIN B. REDELL and JOHN A. PANTER, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Ventilators, of which the following is a specification.

This invention, which relates to means for admitting fresh air to a room, railway car, or other place, is herein illustrated as embodied in a structure designed to be removably placed within a window frame below the lower sash, but, as will appear hereinafter, certain features of the invention are applicable to ventilators permanently installed in the window frame or sash.

One of the objects of the invention is the production of a ventilator structure formed almost entirely of sheet metal.

Another object of the invention is the production of an improved window ventilator structure adapted to be extended so as to completely fill the space between the uprights of the window casing below the sash.

A further object is the provision of improved means for extending and contracting the ventilator structure.

The invention also relates to means for holding the ventilator structure in proper position within the window casing.

The invention further relates to improved means for preventing leakage of air between the ventilator structure and the window sash.

The invention further relates to the other improvements in ventilators hereinafter set forth.

In the accompanying drawings, Figure 1 is a top plan view of a window ventilator embodying the features of our invention, said ventilator being shown in place in a window frame. Fig. 2 is a rear or outer side eleva tion of said ventilator with the air inlet hood removed. Fig. 3 is a fragmental longitudinal horizontal central section through said ventilator. Fig. 4 is a section through the ventilator taken in the plane of dotted line 4 4 of Fig. 3. Fig. 5 is a section on dotted line 5 5 of Fig. 3.

The present embodiment of our invention comprises a body portion or panel 1 intended, as hereinbefore stated, to be removably placed in the window frame, the length of said panel varying with the width of the window frame for which it is intended. The panel 1 in this instance comprises a front plate 2 and a rear plate 3. The plates 2 and 3 are secured together at oints between their ends by means of bol ts 4 extending through said plates and through distance sleeves 5. The lower edges of the plates 2 and 3 are bent at a right angle to form guide flanges 6. The upper edge of the front plate 2 extends somewhat above the upper part of the rear plate 3 and forms a closing flange 7 behind which the lower edge of the lower window sash lies when the sash is closed down upon the ventilator. The upper edge of the rear plate 3 is bent at a right angle to form a guide flange 8, and the middle portions of the plates 2 and 3 are set inwardlyto form guide shoulders 9. This formation of the plates 2 and 3 incidentally divides each plate into three longitudinal panels and serves to beautify the ventilator structure.

In the present embodiment, the ventilator structure is made adjustable in size to fit window frames of varying dimensions and so that it may be inserted between the guide moldings between which the sash is mounted. An extension-panel 10 is slidably mounted in each end of the panel 1. Each of said extension panels consists, in this instance, of two plates 11 and 12. The outer ends of said plates are secured together by screws 13 extending through said plates and through a square bar 14. The lower screw also extends through two distance sleeves 15. Between the inner portions of the plates 11 and 12 extends a square rod 16 to which said plates are riveted at 17 and 18. Lugs 19 on said rod keep the lower portions of the plates 11 and 12 properly spaced apart. The lower edges of the plates 11 and 12 are bent at a right angle to form flanges 20 adapted to slide upon the guide flanges 6. The middle portions of the plates 11 and 12 are bent inwardly to conform to the space between the plates 2 and 3 of the panel 1, thus providing shoulders 'or guide ribs 21 adapted to slide in contact with the shoulders 9 of said panel. As willbe seen from an inspection of Figs. 4 and 5 the shoulders 9 are made concave and constitute grooved ways on which the shoulders or guide ribs 2 1 slide. The construction just described holds the outer ends of the plates 2 and 3 in proper relation to the extension-panels 10.

upper edge.

The upper portion of the plate 11 is extended to form a flange 22 which lies behind the flange 3 of the panel 1. The upper edges of said flanges are bent rearwardly toform a rounded surface in order that the lower edge of the sash, when closed down upon the panel 1, shall not strike against the upper edges of said flanges and bend them. The upper ortion of the plate 12 is bent at a right ang e to provide a flat upper edge 23 for the panel 10, and again at a right angle to provide a portion 24 lying directly behind the flange 22. A strip 25 of felt or other suitable material is cemented or otherwise secured to the flat upper edge 23 of each extension panel 10 and extends along the longitudinal center of said These strips serve to provide an unbroken line from the flange 8 of the rear plate 3 of the panel 1 to the outer ends of the extension panels 10 so as to prevent leakage of air between the ventilator structure and the window sash. Similar strips 26 secured to the lower edges of the extensionpanels 1O serve a like purpose.

As the extension panels 10 slide freely within the panel 1 it is obvious that they may be readily pulled out of said panel as far as necessary to close the space between the uprights of the window frame below the sash. However, we have herein shown one of several possible ways for mechanically moving said extension panels. The means herein shown comprises a bracket 27 rigidly secured in place between the plates 2 and 3. In a bearing opening in said bracket is rotatably mounted a shaft 28 having right and lefthand screw-threads formed upon its opposite ends, the screw-threaded portions engaging in correspondingly threaded openings in the rods 16. A miter gear 29 fixed on the shaft 28 meshes with a similar gear 29 fixed upon the lower end of a vertical shaft 30 rotatably mounted in suitable bearings in the bracket 27. The upper end of the shaft 30 is squared. to receive a key (not shown) for rotating said shaft. The outward movement of the exten sion panels 10 is limited by chains 31 fixed to the rods 16 and distance sleeves 5.

As will be seen, the screw-thread engagement between the shaft 28 and the extension panels 10 looks said extension panels against any movement except that imparted to them through the rotation of the shaft 31. In ventilators having no extension-adjusting means, any suitable device may be used for locking the extension panels in place. We have herein illustrated screws 32 seated in the upper ends of the rods 16, a washer 33 being placed beneath the head of each of said screws in position to clamp the flange 8 of the panel 1 against the flat upper edge portion of the extension panels 10.

34 are curved leaf-springs, preferably pivotally connected with the outer ends of the extension panels 10 upon the rear sides thereof, in position to bear upon the guide-moldings a of the window frame to hold the ventilator structure against the guide-molding b of said window frame.

Fresh air is admitted to the room through the panel 1 at one or more points, depending upon the length of said panel. In the present instance, the air inlet means comprises a hood 35 secured in place over an opening 36 formed in the rear or outer plate 3. The opposite ends of said hood are open to permit ingress of air. From the inner side of said hood at the ends thereof extendv two diagonal vertical walls 37 adapted to direct the air current against concave surfaces 33 formed by a rentrant portion 39 ofthe outer wall of the hood. The inner ends of the walls 37 are bent rearwardly in the portions 40. From the rear or inner ends of said portions 40 extends a partition 41 of wire screen, pcrforated metal or the like, said partition being bent at its middle portion to meet the reentrant portion 39 of the front wall of the hood.

Over an opening 42 in the front plate 2 of the panel 1, registering with the opening 36 in the rearplate 3, is fixed an outlet box 43 having closed forward side, ends and bottom. Across the top of thebox 43 extends a screen 44 of wire netting, perforated metal or simi lar material. The upper end of the box is closed by means of a pivoted cover 45 provided with side segments 46 which are ar- Eangcd to slide within the end walls of the In use, the ventilator structure is placed within the window frame between the guide moldings a and I), the shaft 30 being rotated to extend the extension panels 10 sufliciently far to fill the space between the uprights of the window casing. The leaf springs 34 hold the ventilator structure against the inner guide moldings b so as to prevent leakage of air between the ventilator and the window frame. l/Vhen the lower sash is closed down upon the ventilator, the sash lies behind and in contact with the closing flanges 7 and 22, thus preventing leakage of air between the sash and the ventilator. Air entering the open ends of the hood 35 is directed by the inclined walls 37 against the concave surfaces 38 and from there through the screen 41 and the openings 36 and 42 into the box, 43, the air issuing from said box through the screen 44. It will be seen that the force of the air current entering the hood 35 will be greatly reduced owing to the circuitous path said current is compelled to take. The amount of air admitted through the ventilator is regulated. by opening the cover 45 to a greater or less extent. The segments 46 press against the ends of the box 43 with suflicient force to frictionally hold the cover 45 in adjusted position.

' It will be apparent to those skilled in the art that various mechanical embodiments of the invention are possible, that the means for moving the extension members toward and away from each other may be omitted, and that the air inlet means is capable of use in permanently installed ventilators. WVe, therefore, do not wish to be limited to the exact arrangement and construction herein shown.

We claim as our invention:

1. 'A ventilator structure comprising two metal plates secured together near their middle portions and spaced apart, said plates be ing bent to provide guide ways therein; and an extension member slidably mounted upon said ways between said plates at each end thereof, said ways being adapted to hold said plates in proper relation to said extension members.

2. A ventilator structure comprising two plates secured together near their middle portions and spaced apart; oppositely-facing, grooved guide-ways on said plates; and an extension member having portions slidably mounted. upon and extending into the grooves of said. guide-ways.

3. A ventilator comprising two metal plates secured together near their middle portions and spaced apart, each of said plates being bent to provide two oppositelyfacing, grooved guide-ways upon its inner side; and an extension. member having portions slidably mounted upon and extending into the grooves of said guide-ways.

4. A ventilator structure com rising two metal plates secured together, the ower edges of said plates being bent to .form guide flanges, a guide flange at the upper end of one of said plates, a closing flange at the upper end of the other plate, and extension membersslidably mounted between said plates.

5. A ventilator structure comprising a body portion having guiding means, and an extension member slidably mounted in said body portion, said extension member comprising two plates bent to provide members adapted to slide upon said guiding means, said guiding means and the members sliding thereon being adapted to hold the sides of said body from spreading.

6. A ventilator structure comprising a body portion having guiding means and a closing flange, and an extension member slidably mounted in said body portion, said extension member comprising two plates bent to provide guide members, one of said plates having a portion forming a closing flange constituting an extension of the closing flange on said body portion.

7. A ventilator structure comprising a body portion having guiding means therein and a closing flange, and an extension member slidably mounted in said body portion, said extension member comprising two plates, each bent to provide shoulders adapted to slide upon said guiding means, one of said plates'being bent to form a closed upper edge for said extension member, the other plate having a portion forming a closing flange constituting an extension of the closing flange on said body portion.

8. A ventilator structure comprising a body portion having a closing flange, and two extension members slidably mounted in said body portion, each of said extension members having a closing flange constituting an extension of the closing flange of the body portion.

9. A ventilator structure comprising a body portion; an extension member comprising two plates and a rod lying between said plates and secured thereto; a flange on said body portion adjacent to one end of said rod; and a screw engaging in said rod and adapted to clamp said. flange to said. extension. member.

10. In a ventilator structure,.in combination, a body portion; two extension members each formed of two plates; a bracket carried by said body portion; a shaft having right and left-hand screw-threads upon its opposite ends; a rod lying between and secured to the plates of each of said extension members, said screw-threaded shaft engaging said rod; a gear fixed on said shaft; a shaft carried in said bracket; a gear on said last-mentioned shaft adapted to mesh with said first mentioned gear; and means for rotating said second mentioned shaft.

11. A ventilator structure comprising two metal plates secured together near their middle portions and spaced apart, said lates being bent to provide guideways therein; an extension member slidably mounted upon said ways between said plates at each end thereof, said ways being adapted to hold said plates in proper relation to said exten sion members; a shaft rotatably supported by the two first mentioned plates and having right and left-hand screw-threads upon its opposite ends, said shaft engaging said extension member; and means for rotating said shaft.

12. A ventilator structure comprising a body portion having guiding means, two extension members slidably mounted in said body portion, each of said extension members comprising two plates bent to provide members adapted to slide upon said guiding means, said guiding means and the members sliding thereon being adapted to hold the sides of said body from s reading; a shaft rotatably mounted in said ody portion, and having right and left-hand screw-threads upon its opposite ends, said shaft engaging said extension members; and means for rotating said shaft.

13. A ventilator comprising a hood having open ends, one wall of said hood having a rentrant portion, an inclined wall extend.-

ing toward said rentrant portion, and a tion, and a Wall connecting said screen and screen extending between said rentrant porsaid lmperforate Wall.

tion and said inclined Wall.

14. A ventilator comprising a hood having open ends, one Wall of said hood having a rentrant portion, an imperforate Wall eX- itnesses: tending toward said rentrant portion, a L. L. MILLER,

screen extending from said rentrant por- GEORGE L. CHINDAHL. 

